import type { OpenClawPluginApi } from "openclaw/plugin-sdk";
import { onNewMessage, setMentionOverride, getTurnDebugInfo } from "../turn-manager.js";
import { extractDiscordChannelId } from "../channel-resolver.js";
import type { DirigentConfig } from "../rules.js";

type DebugConfig = {
  enableDebugLogs?: boolean;
  debugLogChannelIds?: string[];
};

type MessageReceivedDeps = {
  api: OpenClawPluginApi;
  baseConfig: DirigentConfig;
  shouldDebugLog: (config: DirigentConfig & DebugConfig, channelId?: string) => boolean;
  debugCtxSummary: (ctx: Record<string, unknown>, event: Record<string, unknown>) => Record<string, unknown>;
  ensureTurnOrder: (api: OpenClawPluginApi, channelId: string) => Promise<void> | void;
  getModeratorUserId: (cfg: DirigentConfig) => string | undefined;
  recordChannelAccount: (api: OpenClawPluginApi, channelId: string, accountId: string) => boolean;
  extractMentionedUserIds: (content: string) => string[];
  buildUserIdToAccountIdMap: (api: OpenClawPluginApi) => Map<string, string>;
  enterMultiMessageMode: (channelId: string) => void;
  exitMultiMessageMode: (channelId: string) => void;
  discussionService?: {
    maybeReplyClosedChannel: (channelId: string, senderId?: string) => Promise<boolean>;
  };
};

export function registerMessageReceivedHook(deps: MessageReceivedDeps): void {
  const {
    api,
    baseConfig,
    shouldDebugLog,
    debugCtxSummary,
    ensureTurnOrder,
    getModeratorUserId,
    recordChannelAccount,
    extractMentionedUserIds,
    buildUserIdToAccountIdMap,
    enterMultiMessageMode,
    exitMultiMessageMode,
    discussionService,
  } = deps;

  api.on("message_received", async (event, ctx) => {
    try {
      const c = (ctx || {}) as Record<string, unknown>;
      const e = (event || {}) as Record<string, unknown>;
      const preChannelId = extractDiscordChannelId(c, e);
      const livePre = baseConfig as DirigentConfig & DebugConfig;
      if (shouldDebugLog(livePre, preChannelId)) {
        api.logger.info(`dirigent: debug message_received preflight ctx=${JSON.stringify(debugCtxSummary(c, e))}`);
      }

      if (preChannelId) {
        await ensureTurnOrder(api, preChannelId);
        const metadata = (e as Record<string, unknown>).metadata as Record<string, unknown> | undefined;
        const from =
          (typeof metadata?.senderId === "string" && metadata.senderId) ||
          (typeof (e as Record<string, unknown>).from === "string" ? ((e as Record<string, unknown>).from as string) : "");

        const moderatorUserId = getModeratorUserId(livePre);
        if (discussionService) {
          const closedHandled = await discussionService.maybeReplyClosedChannel(preChannelId, from);
          if (closedHandled) return;
        }

        if (moderatorUserId && from === moderatorUserId) {
          if (shouldDebugLog(livePre, preChannelId)) {
            api.logger.info(`dirigent: ignoring moderator message in channel=${preChannelId}`);
          }
        } else {
          const humanList = livePre.humanList || livePre.bypassUserIds || [];
          const isHuman = humanList.includes(from);
          const senderAccountId = typeof c.accountId === "string" ? c.accountId : undefined;

          if (senderAccountId && senderAccountId !== "default") {
            const isNew = recordChannelAccount(api, preChannelId, senderAccountId);
            if (isNew) {
              await ensureTurnOrder(api, preChannelId);
              api.logger.info(`dirigent: new account ${senderAccountId} seen in channel=${preChannelId}, turn order updated`);
            }
          }

          if (isHuman) {
            const messageContent = ((e as Record<string, unknown>).content as string) || ((e as Record<string, unknown>).text as string) || "";
            
            // Handle multi-message mode markers
            const startMarker = livePre.multiMessageStartMarker || "↗️";
            const endMarker = livePre.multiMessageEndMarker || "↙️";
            
            if (messageContent.includes(startMarker)) {
              enterMultiMessageMode(preChannelId);
              api.logger.info(`dirigent: entered multi-message mode channel=${preChannelId}`);
            } else if (messageContent.includes(endMarker)) {
              exitMultiMessageMode(preChannelId);
              api.logger.info(`dirigent: exited multi-message mode channel=${preChannelId}`);
              // After exiting multi-message mode, activate the turn system
              onNewMessage(preChannelId, senderAccountId, isHuman);
            } else {
              const mentionedUserIds = extractMentionedUserIds(messageContent);

              if (mentionedUserIds.length > 0) {
                const userIdMap = buildUserIdToAccountIdMap(api);
                const mentionedAccountIds = mentionedUserIds.map((uid) => userIdMap.get(uid)).filter((aid): aid is string => !!aid);

                if (mentionedAccountIds.length > 0) {
                  await ensureTurnOrder(api, preChannelId);
                  const overrideSet = setMentionOverride(preChannelId, mentionedAccountIds);
                  if (overrideSet) {
                    api.logger.info(
                      `dirigent: mention override set channel=${preChannelId} mentionedAgents=${JSON.stringify(mentionedAccountIds)}`,
                    );
                    if (shouldDebugLog(livePre, preChannelId)) {
                      api.logger.info(`dirigent: turn state after override: ${JSON.stringify(getTurnDebugInfo(preChannelId))}`);
                    }
                  } else {
                    onNewMessage(preChannelId, senderAccountId, isHuman);
                  }
                } else {
                  onNewMessage(preChannelId, senderAccountId, isHuman);
                }
              } else {
                onNewMessage(preChannelId, senderAccountId, isHuman);
              }
            }
          } else {
            onNewMessage(preChannelId, senderAccountId, isHuman);
          }

          if (shouldDebugLog(livePre, preChannelId)) {
            api.logger.info(
              `dirigent: turn onNewMessage channel=${preChannelId} from=${from} isHuman=${isHuman} accountId=${senderAccountId ?? "unknown"}`,
            );
          }
        }
      }
    } catch (err) {
      api.logger.warn(`dirigent: message hook failed: ${String(err)}`);
    }
  });
}